Amṛtanāda (Amṛtanādabindu) Upaniṣad 31

31

pārthivaḥ pañcamātrastu caturmātrāṇi vāruṇaḥ |
āgneyastu trimātro'sau vāyavyastu dvimātrakaḥ ||

That which is of the earth is of five māṭrās (or it takes five māṭrās to pronounce Pārṭhiva-Praṇava). That which is of water of four māṭrās; of agni, three māṭrās; of vāyu, two; and of ākāś, one. But he should think of that which is with no māṭrās. Having united Āṭmā with manas, one should contemplate upon Āṭmā by means of āṭmā. Prāṇā is thirty digits long. Such is the position (or range) of prāṇas. That is called Prāṇa which is the seat of the external prāṇas. The breaths by day and night are numbered as 1,13,180. (Of the prāṇas) the first (viz.,) Prāṇa is pervading the heart; Apāna, the anus; Samāna, the navel; Uḍāna, the throat; and Vyāna, all parts of the body. Then come the colours of the five prāṇas in order. Prāṇa is said to be of the colour of a blood-red gem (or coral); Apāna which is in the middle is of the colour of Inḍragopa (an insect of white or red colour); Samāna is between the colour of pure milk and crystal (or oily and shining), between both (Prāṇa and Apāna): Uḍāna is apāṇdara (pale white); and Vyāna resembles the colour of archis (or ray of light). That man is never reborn wherever he may die, whose breath goes out of the head after piercing through this maṇdala (of the pineal gland). That man is never reborn.